Cup lid



FIG. 1 is a top and front perspective view of the cup lid showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a cup lid, as shown and described. 